Clean up use of deprecated HTML tags.

Review Request #8736 — Created Feb. 10, 2017 and submitted — Latest diff uploaded

Information

Review Board
release-3.0.x
894fb6e...

Reviewers

The <b>, <i>, and <tt> tags have all been deprecated for a while. This
change cleans things up to use their modern equivalents. There's still some use
of <font> in e-mail templates, but apparently we have to keep that around for
compatibility with terrible e-mail clients.